Insulated bearing

An electrically insulated bearing, comprising:

• an outer ring comprising an inner rolling surface and an outer spiral groove;
• a plurality of rolling elements in rolling contact with the inner rolling surface;
• a first aluminum electrically insulating cap screwed onto the outer ring from a first axial end, the first aluminum electrically insulating cap comprising a first inner spiral, complementary to the outer spiral groove;
• and
• a second aluminum electrically insulating cap screwed onto the outer ring from a second axial end, opposite the first axial end, the second aluminum electrically insulating cap comprising a second inner spiral, complementary to the outer spiral groove, and
• wherein the first aluminum electrically insulating cap overlaps with the second aluminum electrically insulating cap.

An electrically insulated bearing, comprising:

• an outer ring comprising:
• an inner rolling surface;
• an outer spiral groove;
• and
• axially opposite annular surfaces;
• a plurality of rolling elements in rolling contact with the inner rolling surface;
• a first electrically insulating cap having a first inner spiral configured to cooperate with the outer spiral groove so as to secure the first electrically insulating cap to the outer ring;
• and
• a second electrically insulating cap having a second inner spiral configured to cooperate with the outer spiral groove so as to secure the second electrically insulating cap to the outer ring, and
• each electrically insulating cap comprises:
• a cylindrical portion, the inner spiral protruding therefrom;
• and
• an annular portion extending radially inward from the cylindrical portion;
• and
• each of the electrically insulating caps is screwed onto the outer ring until the respective annular portion directly contacts a respective one of the axially opposite annular surfaces;
• and
• the first electrically insulating cap and the second electrically insulating cap prevent electrical current to flow into the outer ring via an anodized layer formed on the first electrically insulating cap and an anodized layer formed on the second electrically insulating cap.